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1.
someone who takes pleasure from the sniffing of male bums
fuck off lawson u bum sniff
by gavin lawson May 07, 2003
 
2.
Sniffing something with one's anus. Place the anus over somebodys face and clench the muscles of the bottom,, the opposite of a fart, thus bumsniffing.
Michael always wanted to bumsniff Merlo, so when the chance came, he bumsniffed him then he had a tashwank to celebrate.
by Pervy P April 28, 2009
 
3.
Someone who sniffs bums, an insult
look at you, you little bumsniff
by Lloydy February 22, 2005
 
4.
A more polite word used instead of an expleetive.
"Oh bumsniff, i crashed my spitfire again"
by YaZoR May 08, 2003